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The posterior suprascapular nerve block has been proposed as an analgesic alternative for shoulder surgery based on the publication of several comparisons with interscalene block that failed to detect differences in analgesic outcomes. However, quantification of the absolute treatment effect of suprascapular nerve block on its own, in comparison with no block (control), to corroborate the aforementioned...
Current descriptions of thoracic paravertebral block techniques require the needle tip to be anterior to the superior costotransverse ligament. We hypothesised that an injection point midway between the posterior border of the transverse process and the pleura would result in spread to the paravertebral space. We completed bilateral injections of 5 ml methylene blue 0.2% midway between the posterior...
Starting with a frequency domain analysis of the ground impedance between two points on a solid ground plane of a printed circuit board, closed formulae to calculate the ground impedance in frequency domain is presented. The approach which takes into account the skin-effect and striction effect in frequency domain is extended to calculate the voltage difference between two points on the ground plane...
In high speed and wideband electronic circuit applications, it is desirable to minimize the cross-talk between parallel tracks on the printed circuit board. This paper presents a technique using vias, with which the cross-talk can be reduced by 50 to 90%. A SPICE model combined with the finite element method is developed to predict the performance and is validated with experimental results.
This paper describes possible applications of finite element method to EMI/C problems. The applications are related to crosstalk problems on printed circuit boards, and calculation of losses on printed circuit board environment.
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